Rapid and Local Self-Healing Ability of Polyurethane Nanocomposites Using Photothermal Polydopamine-Coated Graphene Oxide Triggered by Near-Infrared Laser

Ha, Yu‐Mi; Kim, Young Nam; Jung, Yong Chae

doi:10.3390/polym13081274

Cited by 25 publications

(19 citation statements)

References 44 publications

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“…The chemical bonding of the surface was determined by ATR-FTIR in the range of 650-4000 cm −1 and scan speed (0.2 cm/s). For XPS condition, microfocus X-ray (1486.6 eV) was used with charging correction (adventitious carbon, 284.8 eV) and dual neutralizer (Ar ion + electrons) [31,32]. The pH changes were measured by a pH meter (Mettler Toledo, Columbus, OH, USA) in 5 mL of PBS solution containing Proteinase K at 37 • C for 14 days.…”

Section: Characterization Of Plga Composite Filmsmentioning

confidence: 99%

“…We previously established that PLGA-based biodegradable implants containing magnesium hydroxide (MH) effectively alleviated the adverse effects induced by acidic PLGA byproducts [30,31]. In addition, decellularized extracellular matrix (dECM) is extensively used as a platform for the bioengineering of medical implants to enhance and control the interaction between implants and host tissues [32]. Therefore, PLGA/MH/dECM composite film was fabricated by solvent casting, and then the surface of composite films with fibronectin (FN), polyethylenimine (PEI), and polydopamine (PDA) was coated as described in Section 2.…”

Section: Characterization Of Plga Composite Filmsmentioning

confidence: 99%

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Comparison of Surface Functionalization of PLGA Composite to Immobilize Extracellular Vesicles

Woo

Cha

et al. 2021

Polymers

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Endothelialization by materials provides a promising approach for the rapid re-endothelialization of a cardiovascular implantation. Although previous studies have focused on improving endothelialization through the immobilization of bioactive molecules onto the surface of biodegradable implants, comparative studies of effective surface modification have not yet been reported. Here, we conducted a comparative study on the surface modification of poly(lactide-co-glycolide) (PLGA)-based composites to graft mesenchymal stem cell-derived extracellular vesicles (MSC-EVs) using three different materials, fibronectin (FN), polyethylenimine (PEI), and polydopamine (PDA), which have different bond strengths of ligand–receptor interaction, ionic bond, and covalent bond, respectively. Further in vitro analysis exhibited that MSC-EVs released from all modified films sustainably, but the MSC-EVs grafted onto the surface coated with PEI are more effective than other groups in increasing angiogenesis and reducing the inflammatory responses in endothelial cells. Therefore, the overall results demonstrated that PEI is a desirable coating reagent for the immobilization of MSC-EVs on the surface of biodegradable implants.

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Section: Characterization Of Plga Composite Filmsmentioning

confidence: 99%

Section: Characterization Of Plga Composite Filmsmentioning

confidence: 99%

Comparison of Surface Functionalization of PLGA Composite to Immobilize Extracellular Vesicles

Woo

Cha

et al. 2021

Polymers

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“…They can obtain energy from external stimuli, and then convert it into heat to transfer to the TPU matrix and make the temperature of the TPU matrix rapidly increase. It promotes the self-healing process, including wetting, diffusion, recombination, rearrangement, and the formation of an interpenetrating network structure through the interpenetrating bridge at the scratch section [ 38 , 39 , 40 ]. We reported self-healing TPU composites, including reduced GO-water PU [ 41 ], G-TPU [ 42 , 43 ] and GO-TPU [ 44 ], and demonstrated that TPU composites containing appropriated loading of G or GO can achieve a rapid multiple thermal self-healing performance.…”

Section: Introductionmentioning

confidence: 99%

“…Previous works mainly focused on the effect of carbon nanomaterials on TPU self-healing behavior, but did not pay attention to the properties of the TPU matrix [ 37 , 38 , 39 ]. Here, we prepared G-TPU composites with four kinds of TPU masterbathes with different characteristics and investigated the electrical, mechanical, thermal and infrared thermal response and the near-infrared-light-assisted self-healing properties of the composite films prepared by different initial concentrations of TPU and four kinds of TPU masterbathes, respectively, especially discussing the relationship between the characteristics of TPU and the near-infrared thermal response performance and near-infrared-light-assisted self-healing properties of the composite films.…”

Section: Introductionmentioning

confidence: 99%

Near-Infrared-Light-Assisted Self-Healing Graphene-Thermopolyurethane Composite Films

Wang

Zhou

et al. 2022

Polymers

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Graphene-thermopolyurethane (G-TPU) composite films were fabricated and the effects of the TPU initial concentration, characteristics of TPU, and graphene loading on the electrical, mechanical, thermal, infrared thermal response and near-infrared-light-assisted self-healing properties of the composite films were investigated in detail. The experimental results demonstrate that the comprehensive performances of the composite film are related to the initial concentration of the TPU solution and the characteristics of the TPU and the graphene loading. The composite film prepared from TPU solution with low initial concentration can have conductivity under the condition of low graphene content. However, the composite film prepared with appropriate initial concentration of TPU solution and high graphene loading is conducive to obtain high conductivity. After 60 s of near-infrared illumination, the temperature of the composite film first increases and then decreases with the increase in graphene loading until it reaches saturation. The near-infrared light thermal response of the composite film with high graphene loading is related to the initial concentration of TPU solution, while the near-IR thermal response of the composite film with low graphene loading is independent of the initial concentration of TPU. The surface micro-cracks of the composite film almost disappeared after 10 min of near-infrared illumination. The resistance of the conductive composite film increases after healed. The composite film prepared with low melting point TPU is more favorable to obtain high near-IR thermal self-healing efficiency.

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“…DL/rDL reaction is probably the most well-known chemical reaction used for achieving the self-healing ability in materials [18,19]. Since the first report of thermally reversible polymer networks containing Diels-Alder functionality in 1969 [20], several systems based on this reaction using various functionalities have been investigated and reported [8,21,22].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Self-Healing Polyurethane Powder Coating Using Diels–Alder Reaction

2021

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Although powder coating systems offer many environmental, ecological and energy related benefits over liquid based coatings, in the case of uretdione based polyurethane systems, high curing temperature is still an issue. On the other hand, powder coating systems make it possible to reduce the costs and enhance the process of forming complex 3D structures using the deep drawing method by pre-coated metal substrates. During this processing method, there is a probability of micro crack formation in the coated film due to strain impact on the coating layer. A powder coating with self-healing ability is an ultimate solution to face not only this kind of fraction but also any other possible ones (such as defects caused by any impact on film surface during processing, transporting or even service). Here, a single molecule that is prepared via Diels–Alder cycloaddition reaction and retro Diels–Alder cleavage reaction was utilized as a self-healing additive to achieve self-healing ability in the powder coating system that is based on a commercially available uretdione cross-linker and OH-polyester resin. Coatings were prepared through melt mixing of components in a lab mixer, milling, sieving, and then application on the metal substrate through the electrostatic spraying method. To illustrate the role of self-healing additive, various concentrations (4 and 9% wt.) in combination with different curing temperatures (80 °C to 200 °C) were investigated. Both samples containing HA showed self-healing ability at elevated temperature around 120 °C for about 30 min with acceptable roughness and surface properties. Hardness measurement of cured film as well as thermal investigation indicate the chemical reaction of HA in a cross-linked network of cross-linker and resin. In addition, using HA leads to a 40 K drop in curing temperature of the system without using any catalyst. A 2.58% improvement in hardness values at a lower curing temperature and healing time of around 12.5 min at 120 °C to recover 100% of initial scratch (more than 10 cycles) in the sample containing 9% wt. HA was observed.

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Rapid and Local Self-Healing Ability of Polyurethane Nanocomposites Using Photothermal Polydopamine-Coated Graphene Oxide Triggered by Near-Infrared Laser

Cited by 25 publications

References 44 publications

Comparison of Surface Functionalization of PLGA Composite to Immobilize Extracellular Vesicles

Comparison of Surface Functionalization of PLGA Composite to Immobilize Extracellular Vesicles

Near-Infrared-Light-Assisted Self-Healing Graphene-Thermopolyurethane Composite Films

Preparation and Characterization of Self-Healing Polyurethane Powder Coating Using Diels–Alder Reaction

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